In this paper,a review was finished according to a novel-"The Time Traveler's Wife".It use time travel to explore miscommunication and distance in relationships.A lot of knowledge could be obtained from ...In this paper,a review was finished according to a novel-"The Time Traveler's Wife".It use time travel to explore miscommunication and distance in relationships.A lot of knowledge could be obtained from the passage.展开更多
A class of nonidentical parallel machine scheduling problems are considered in which the goal is to minimize the total weighted completion time. Models and relaxations are collected. Most of these problems are NP-hard...A class of nonidentical parallel machine scheduling problems are considered in which the goal is to minimize the total weighted completion time. Models and relaxations are collected. Most of these problems are NP-hard, in the strong sense, or open problems, therefore approximation algorithms are studied. The review reveals that there exist some potential areas worthy of further research.展开更多
AIM: To provide a systematic update of the evidence concerning the relationship between economic recession and suicide.METHODS: A keyword search of Ovid Medline, Embase, Embase Classic, PsycI NFO and PsycA RTICLES was...AIM: To provide a systematic update of the evidence concerning the relationship between economic recession and suicide.METHODS: A keyword search of Ovid Medline, Embase, Embase Classic, PsycI NFO and PsycA RTICLES was performed to identify studies that had investigated the association between economic recession and suicide. RESULTS: Thirty-eight studies met predetermined selection criteria and 31 of them found a positive association between economic recession and increased suicide rates. Two studies reported a negative association, two articles failed to find such an association, and three studies were inconclusive. CONCLUSION: Economic recession periods appear to increase overall suicide rates, although further research is warranted in this area, particularly in low income countries.展开更多
As we bring 2024 to a close and step into the promise of 2025,it is a moment to celebrate our accomplishments,revisit our commitments,and chart the course ahead for Health Care Science.1|A Year of Progress This year m...As we bring 2024 to a close and step into the promise of 2025,it is a moment to celebrate our accomplishments,revisit our commitments,and chart the course ahead for Health Care Science.1|A Year of Progress This year marked extraordinary growth for Health Care Science.We received a total of 225 manuscript submissions—a remarkable 55.8%increase from the previous year.Thanks to the dedication and expertize of our reviewers and editorial team,we maintained an average review time of just 35 days,ensuring a swift and rigorous editorial process.展开更多
Bluetooth technology emerged over twenty years ago and has continuously improved throughout the years to meet diverse and complex applications. Initially invented to replace the need for physical data cables, Bluetoot...Bluetooth technology emerged over twenty years ago and has continuously improved throughout the years to meet diverse and complex applications. Initially invented to replace the need for physical data cables, Bluetooth offers users a quick and easy way to share data files over a wireless network. Traffic engineers and transportation engineering researchers have utilized the potential opportunities that exist with Bluetooth and have implemented this technology into traffic monitoring techniques. To gain a better understanding of Bluetooth sensors and how they work, a comprehensive literature search was conducted. Twenty-five articles were studied regarding case studies of Bluetooth sensor implementation for travel time measurement. Besides reviewing the literature and previous case studies, three new case studies in the State of Delaware, USA, were also conducted and carefully analyzed. The benefits and drawbacks associated with Bluetooth technology for travel time measurements have been identified in this paper. The overall conclusion of the authors is Bluetooth alone and by itself is not a proper technology for travel time measurements. More studies need to be conducted on the accuracy and overall application, before one can confidently utilize the Bluetooth technology for travel time measurements.展开更多
效能是衡量多阶段攻防对抗体系(system-of-systems,SoS)性能的重要指标,代表着完成任务的有效程度。在执行任务期间,外部环境不断变化,SoS效能存在时间依赖关系。针对此问题,运用拓展的图示评审技术(graphical evaluation and review te...效能是衡量多阶段攻防对抗体系(system-of-systems,SoS)性能的重要指标,代表着完成任务的有效程度。在执行任务期间,外部环境不断变化,SoS效能存在时间依赖关系。针对此问题,运用拓展的图示评审技术(graphical evaluation and review technique,GERT)来评估多阶段攻防对抗SoS效能。首先,根据SoS任务执行的多阶段特征构建GERT网络,并分析网络的传递特性。然后,在效能结果计算上,考虑时间因素,设计一个新的任务有效度参数来体现效能的时间依赖特征,利用c、z标记法,以获得关键组件系统执行关键任务的相关参数。最后,以导弹防御SoS的防御作战任务为例,对防御作战任务的执行效果进行评估,获得体系效能、作战时间、备弹量、导弹首次击中目标时间等指标数据,为体系编配方案优化提供涵盖更多信息的决策指标。展开更多
文摘In this paper,a review was finished according to a novel-"The Time Traveler's Wife".It use time travel to explore miscommunication and distance in relationships.A lot of knowledge could be obtained from the passage.
基金the National Natural Science Foundation of China (70631003)the Hefei University of Technology Foundation (071102F).
文摘A class of nonidentical parallel machine scheduling problems are considered in which the goal is to minimize the total weighted completion time. Models and relaxations are collected. Most of these problems are NP-hard, in the strong sense, or open problems, therefore approximation algorithms are studied. The review reveals that there exist some potential areas worthy of further research.
文摘AIM: To provide a systematic update of the evidence concerning the relationship between economic recession and suicide.METHODS: A keyword search of Ovid Medline, Embase, Embase Classic, PsycI NFO and PsycA RTICLES was performed to identify studies that had investigated the association between economic recession and suicide. RESULTS: Thirty-eight studies met predetermined selection criteria and 31 of them found a positive association between economic recession and increased suicide rates. Two studies reported a negative association, two articles failed to find such an association, and three studies were inconclusive. CONCLUSION: Economic recession periods appear to increase overall suicide rates, although further research is warranted in this area, particularly in low income countries.
文摘As we bring 2024 to a close and step into the promise of 2025,it is a moment to celebrate our accomplishments,revisit our commitments,and chart the course ahead for Health Care Science.1|A Year of Progress This year marked extraordinary growth for Health Care Science.We received a total of 225 manuscript submissions—a remarkable 55.8%increase from the previous year.Thanks to the dedication and expertize of our reviewers and editorial team,we maintained an average review time of just 35 days,ensuring a swift and rigorous editorial process.
文摘Bluetooth technology emerged over twenty years ago and has continuously improved throughout the years to meet diverse and complex applications. Initially invented to replace the need for physical data cables, Bluetooth offers users a quick and easy way to share data files over a wireless network. Traffic engineers and transportation engineering researchers have utilized the potential opportunities that exist with Bluetooth and have implemented this technology into traffic monitoring techniques. To gain a better understanding of Bluetooth sensors and how they work, a comprehensive literature search was conducted. Twenty-five articles were studied regarding case studies of Bluetooth sensor implementation for travel time measurement. Besides reviewing the literature and previous case studies, three new case studies in the State of Delaware, USA, were also conducted and carefully analyzed. The benefits and drawbacks associated with Bluetooth technology for travel time measurements have been identified in this paper. The overall conclusion of the authors is Bluetooth alone and by itself is not a proper technology for travel time measurements. More studies need to be conducted on the accuracy and overall application, before one can confidently utilize the Bluetooth technology for travel time measurements.
文摘效能是衡量多阶段攻防对抗体系(system-of-systems,SoS)性能的重要指标,代表着完成任务的有效程度。在执行任务期间,外部环境不断变化,SoS效能存在时间依赖关系。针对此问题,运用拓展的图示评审技术(graphical evaluation and review technique,GERT)来评估多阶段攻防对抗SoS效能。首先,根据SoS任务执行的多阶段特征构建GERT网络,并分析网络的传递特性。然后,在效能结果计算上,考虑时间因素,设计一个新的任务有效度参数来体现效能的时间依赖特征,利用c、z标记法,以获得关键组件系统执行关键任务的相关参数。最后,以导弹防御SoS的防御作战任务为例,对防御作战任务的执行效果进行评估,获得体系效能、作战时间、备弹量、导弹首次击中目标时间等指标数据,为体系编配方案优化提供涵盖更多信息的决策指标。
